Pozzolana, is the mixture of Portland cement, high quality silica sand and various active chemical substances. When it is mixed with water and spread on the concrete, these active chemicals do not dissolve in the water; instead they are formed into crystals and penetrate deep into the concrete by osmotic pressure. These fill the capillaries in the concrete and transform the concrete into a water proof structure.

Pozzolana is not a coating material. Its approach towards water insulation is to make the concrete a water proof structure. It is not an additive and therefore the problems which can occur during the placement of the concrete into the cast is not a problem for Pozzolana. Pozzolana is applied onto the finished concrete products with the help of a brush and it makes that concrete impermeable.

APPLICATION TO FRESH CONCRETE
Pozzolana requires water to function correctly. For application of Pozzolana to very old and dry concrete, the surfaces of that concrete shall be densely soaked with water. The results are excellent when it is applied onto the fresh concrete surfaces.

SAME AT THE NEGATIVE AND POSITIVE INSULATION
The insulation process is realized from inside, therefore there are no differences for Pozzolana between the interior insulation of an underground structure (negative insulation) and the exterior insulation of a structure like terrace (positive insulation). A water reservoir can be insulated from outside without emptying the water inside the reservoir, also the basement floors of the buildings can be insulated from inside under the ground.

PROTECTS THE CONCRETE AND THE REINFORCEMENT
Pozzolana applied concrete becomes protected against various chemical substances and negative impacts of harmful liquids like sea water or waste water. Pozzolana prevents the corrosion of the concrete due to these harmful substances and also it prevents the decay of concrete due to alkaline or salts. It also protects the reinforcement within the concrete and prevents its corrosion by the same way. The problems of desquamation and elastic deformation as a result of the expansion and contraction during freezing are removed.

DOES NOT REMOVE THE BREATHING FUNCTION OF THE CONCRETE
There are voids in the Pozzolana applied concrete from which air can pass but water can not pass through. Therefore, the concrete can continue to breath. This feature is very important. Especially at the terrace roofs and reinforced concrete exterior walls done by the tunnel cast, it solves the problem of condensation and also removes the requirement to make steam stabilizer.

IT IS NOT TOXIC
There are no toxic substances in Pozzolana. It can be utilized safely in water reservoirs, silos and food depots.

IT CAN BE APPLIED FAST AND EASILY
There is no need for plaster or grout on the surface to be applied and also there is no need to any protective construction during the application. The application process is simple and fast. It provides great time saving.

GUARANTEED FOR THE LIFETIME OF THE CONCRETE
The insulation is permanent unless the concrete structure is cracked, drilled or braked. There is the risk of water entering into the concrete for the coated structures but this problem is not valid for Pozzolana applied structures even if they crack. Its repair is very easy and it can be repaired even from the opposite side of the crack.

IT IS PROBLEM FREE
There are no problems like tears, punctures, folding from joints, no adherence, and requirement of dry surfaces.

IT IS THE LEAST COST METHOD
Besides the very low material costs, it does not require any auxiliary materials like plaster or grout, etc. and with a minimum number of workers large areas can be insulated. Therefore it is the least cost water insulation method and has the maximum guarantee conditions.   

Positive Insulation and Under Low Hydrostatic Pressure
Volumetric 2 units of mixture shall be mixed with 1 unit water and applied. Consumption rate is averagely 0.8 kg/m² for one layer. It shall be applied two layers.

Negative Insulation and Under High Hydrostatic Pressure
Volumetric 2 units of mixture shall be mixed with 1 unit water and the first layer shall be applied. Same proportions shall be applied once more after the first layer setting is finished. Consumption rate is averagely 1.6 kg/m².

Surface Repairs
Volumetric 3 units of mixture shall be mixed with 1 unit water and applied. Consumption rate is averagely 1 kg/m².

At the cold pointings, concrete cracks and joint.
Volumetric 6 units of mixture shall be mixed with 1 unit water and applied. Always, water shall be added into the Pozzolana. The water to be used shall be clean.
There shall not be any dirt, grease or other foreign substances on the surfaces which Pozzolana will be applied. For the material to go deep into the capillaries, they shall be open. Therefore, it will be better to apply HCl onto the surface if required. 
Cracks, segregations, concrete joints and weak concrete areas shall be opened until reaching the strong concrete zones, one layer of Pozzolana shall be applied and the structure shall be repaired. The surroundings of the foreign materials (like wood, reinforcement, etc) in the concrete shall be opened for a depth of 3-5 cm and shall be filled with Pozzolana.
If the application surface is dry, it shall be densely soaked with water and then the excess water on the surface shall be removed with the help of a sponge. Pozzolana shall be applied onto this moisturized concrete surface. The application shall be done with the help of a semi hard bristled brush which is also known as Izmir Brush. It shall be ensured that the material is entirely applied onto the surface.
In order to ensure that the material is settled in airless medium, it will be beneficiary to circulate the air by a ventilator or to blow hot air.
Spraying water onto the surface can be required at very dry medium before applying the second layer. In the following 48 hours, the surface shall be protected against water pressure before the material is settled. It shall not be forgotten that Pozzolana moves forward to water.
When the cold pointings are opened as 2x2 dimensions, the consumption rate of the material used in the form of plaster is 1 kg/m.
It shall not be applied at the open surfaces during rain and frost.
Please refer to the application manual for various types of application methods.
You can get answer to your questions during the application from our technical office.

During the following 2-3 days after the application, water shall be pulverized in the form of mist as cure. Water shall not be stored within 10 days after the application in the areas where water will be hold, like reservoir or pool, etc.

  �zosan Ltd. Co. in Ankara is in service by its technical offices for all of your detailed questions about Pozzolana. The applications are implemented by our experienced and trained teams.

It is packed in propylene bags of 30 kg or in plastic buckets of 20 kg.